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Mnenie [13.5K]
3 years ago
6

A runner is participating in the Boston Marathon. He has run 12 miles of the 26.2 mile course. What percent of the course has he

run so far?
Mathematics
2 answers:
Pani-rosa [81]3 years ago
6 0
45.8% or rounded up to 46%
Natasha2012 [34]3 years ago
4 0
46% just so you know i rounded this up!
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Pls help me<br> also pls put the right answer
Y_Kistochka [10]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Start 3 end 10 what present did it go up
wlad13 [49]
7 is the answer 3+7=10
6 0
3 years ago
Simplify each of the expression (x-7)(x+3)
emmainna [20.7K]

Answer:

x² - 10x + 21

Step-by-step explanation:

yw

4 0
2 years ago
he​ half-life for a link on a social network website is 2.6 hours. Write an exponential function T that gives the percentage of
pychu [463]

Answer:

% Remaining= [1-(1/2)^{\frac{t}{2.6}}]x100

And replacing the value t =5.5 hours we got:

% Remaining= [1-(1/2)^{\frac{5.5}{2.6}}]x100 =76.922\%

Step-by-step explanation:

Previous concepts

The half-life is defined "as the amount of time it takes a given quantity to decrease to half of its initial value. The term is most commonly used in relation to atoms undergoing radioactive decay, but can be used to describe other types of decay, whether exponential or not".

Solution to the problem

The half life model is given by the following expression:

A(t) = A_o (1/2)^{\frac{t}{h}}

Where A(t) represent the amount after t hours.

A_o represent the initial amount

t the number of hours

h=2.6 hours the half life

And we want to estimate the % after 5.5 hours. On this case we can begin finding the amount after 5.5 hours like this:

A(5.5) = A_o (1/2)^{\frac{5.5}{2.6}}

Now in order to find the percentage relative to the initial amount w can use the definition of relative change like this:

% Remaining = \frac{|A_o - A_o(1/2)^{\frac{5.5}{2.6}}|}{A_o} x100

We can take common factor A_o and we got:

% Remaining= [1-(1/2)^{\frac{t}{2.6}}]x100

And replacing the value t =5.5 hours we got:

% Remaining = [1-(1/2)^{\frac{5.5}{2.6}}]x100 =76.922\%

5 0
3 years ago
What is called the principal value of the argument?
Diano4ka-milaya [45]
 the <span>principal branch Im pretty sure

</span>
3 0
3 years ago
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